anarchyb52

iTrader: (13)

I've done plenty of reading around about the topic of swapping out my NA to Turbo II rear end. I cant find any alternatives though. Everyone keeps saying you must swap. I want to know if I could just drop in a Kaaz. In that situation would I have to change the input to the diff? Is the housing strong enough or do I have to have the turbo housing.

In short what are my options. I want a lsd that can take whatever I throw at it and swapping cant be the only solution. I just want to know my options. Alot of people seem to be running aftermarket lsds in their TII so if I do swap it seems I would have to spend even more on one later.

Aaron Cake

iTrader: (1)

I don't know if Kazz makes a diff for the NA.

I know that there are Miata diff swapping options but as I've never looked into it, I don't know the specifics.

The TII rear end bolts right in but you also need the TII half shafts. Additionally, you need a custom driveshaft if you intend to still run the NA transmission. If you run the TII transmission, you can run a TII shaft.

Rxmfn7

iTrader: (4)

What are your needs for the diff? Power output? Ive done a miata torsen swap and it was years ago but I believe my writeup is still in the archives. This does not solve the problem that you still have a weak 7" N/A ring. IMO its not really worth even playing with the N/A rear end at all. Spend a few hundred bucks and buy a T2 trans, driveshaft, rear end and axles and spend a few hours one afternoon swapping it all in and be done with it.

anarchyb52

iTrader: (13)

There is my answer thank you fn7. The housings inner ring is 7" vs the 8" of the turbo 2 correct? making the 2 housings different. Kaaz does make a lsd for the non turbo so does cusco. I wish more people would explain things rather then saying just swap it. I like to know why I'm blowing money. Target is 300 hp I already have a rebuilt T2 tranny. I still haven't decided on motor yet but I am leaning toward a s5 T2 since I can source them for fairly cheap. This is going to be my winter project. I have a good starting point with a pretty clean shell it just needs some good old fashion work put into her.

Aaron Cake

iTrader: (1)

If you have an NA LSD, then 300HP will be no problem for it. No need to swap anything around. Crap, I'm at 500 wheel HP on my NA diff and counting...

RockLobster

iTrader: (7)

A clutch type N/A LSD should be stout enough for 300 HP rotary.

I would not recommend a miata torsen swap for drag type launching. I am using a miata torsen in an N/A carrier assembly for a road racing car. i dont expect to have any problems with it. But again this is not launching shock loading. From what i've always read it's when you start launching that you blow up torsen rear ends (N/A or turbo) in these cars.

anarchyb52

iTrader: (13)

The plan is for a drift style setup were if I get sick of drifting I can circuit the car rather easily or time attack or auto cross whatever. Its not a dd its strictly a weekend race car. The NA rear end cant handle clutch kicking and high rpm power overs from what I have heard. I plan on being mildly abusive to this car in as loving a way as I can be. I think I might have found a complete diff for 75 dollars then ill just buy new axles from autozone and core out the ones I got. whole swap done for around 200 maybe. A used jdm kaaz is 400 to 500 ebay price. So which way you think I should go? My 90 gxl according to the spread sheet doesn't have an lsd from what I can infer. Am I wrong?

Aaron Cake

iTrader: (1)

It is launches and sticky tires that kill the diffs. On street tires they will take a crapload of abuse.

I don't know much about drifting because I'm 30 and not 12, but isn't it mostly a loss of traction? Seems to me that would put very little strain on the diff. True, there would be some shock loading from dumping the clutch but the tires should be letting go anyway. They will easily with 300HP.

Your GXL doesn't have an LSD. Only S4 GXLs were LSD equipped.

anarchyb52

iTrader: (13)

Well its a lot of breaking the tires free and creating a loss of traction there are different ways to do this. I think I will have to swap over since I will be pretty damning on my lsd.